I didn't give it access to my camera but it sounds like it's giving "attractiveness" ratings, but jeez, that's super complex. I imagine this thing is measuring symmetry and proportion, but that'll only get you so far; the "hottest" A-list actors usually have a kind of wabi-sabi quality, with oversized teeth, or an interestingly shaped nose, or a crooked smile. There are also obviously all kinds of attractive, and emotional baggage that factors into what's attractive to people (they're reminded of a parent or childhood crush, etc.)
The most interesting attractiveness-measurer I ever saw was a subreddit where you'd post your own photo, and members of the community would post photos of people who are equal to your own attractiveness, so it effectively threw ego out of the equation.